1. Agerer, F. & Hubscher, J. 1996, Inf. Bull. Variable Stars, 4383
2. Agerer, F. & Hubscher, J. 1997, Inf. Bull. Variable Stars, 4472
3. Agerer, F. & Hubscher, J. 1999, Inf. Bull. Variable Stars, 4711
4. Agerer, F. & Hubscher, J. 2000, Inf. Bull. Variable Stars, 4912
5. Agerer, F. & Hubscher, J. 2002, Inf. Bull. Variable Stars, 5296